You need to clean out your washer botle,its not that hard to do but you mite need a bit of help with puting it back,take of the near-side wheel (thats if its right hand drive,left hand drive is oposit)and then take of the wheel arch skin its only 3 screws holding it on then under the wheel arch you will see the washer botle undo the 2 bolts and just drop the botle down but take care not to pull the pipes out of the botom once you have got it out take of the pipes and the pump,behind the pump is a rubber bung take that out and empty the botle,get a hose and flush it out,it will be full of black gunk thats wot is blocking the pipes to the jets all that is,is putin washing-up liquid in the washer,and it has gon off,anyway all the best and hope you get it sourted, steveo

There is a filter at the bottom of the fliud reservoir that becomes blocked.
This is situated behind the passenger side inner wing. Making sure car is jacked safely remove p/s wheel and inner wing, a few screws and a couple of 10ml bolts not rocket science. The motor of held into the bottom of the reservoir by a rubber bung. Pull this away from the reservoir and the bung should detach allowing the perforations at one end to be cleaned. This cured my washer problem.
Lud

Hi Stuart,

The motor may be on its way out, but there is something you can do before you get a new one.

Disconnect the hose leading from the washer reservoir to the "jets" on the hood, or wipers, where ever they are located.

See if you can blow through the hose, if not, there is an obstruction. If you can, I don't know what to tell you.

Best of luck

Lazaruselite